2 You constantly work to improve your mind and rejoice in succeeding perfectly. Once per day when making a intelligence-based check, you may use two die and use the higher roll. If both of these dice are a natural 20, you regain one use of this ability.

3 Blade adept develops a bond with a blade and infuses it with arcane power. This ability works like a wizard's arcane bond ability save that the blade adept must bond to a one-handed piercing or slashing melee weapon. Additionally, the blade adept gains proficiency with the weapon if it is a simple or martial weapon.

4whenever a arcanist casts a spell with a range of “touch” from the arcanist spell list, he can deliver the spell through bonded weapon he is wielding as part of a melee attack. Instead of the free melee touch attack normally allowed to deliver the spell, a arcanist can make one free melee attack with his bonded weapon (at his highest base attack bonus) as part of casting this spell. If successful, this melee attack deals its normal damage as well as the effects of the spell. This attack uses the weapon’s critical range (20, 19–20, or 18–20 and modified by the keen weapon property or similar effects), but the spell effect only deals ×2 damage on a successful critical hit, while the weapon damage uses its own critical modifier.